1320 lines
42 KiB
C++
1320 lines
42 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2011 Daniel Marjamäki and Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "tokenize.h"
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#include "checkstl.h"
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#include "testsuite.h"
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#include <sstream>
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extern std::ostringstream errout;
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class TestStl : public TestFixture
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{
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public:
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TestStl() : TestFixture("TestStl")
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{ }
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private:
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void run()
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{
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TEST_CASE(iterator1);
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TEST_CASE(iterator2);
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TEST_CASE(iterator3);
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TEST_CASE(iterator4);
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TEST_CASE(iterator5);
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TEST_CASE(iterator6);
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TEST_CASE(iterator7);
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TEST_CASE(iterator8);
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TEST_CASE(dereference);
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TEST_CASE(dereference_member);
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TEST_CASE(STLSize);
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TEST_CASE(STLSizeNoErr);
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TEST_CASE(erase1);
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TEST_CASE(erase2);
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TEST_CASE(erase3);
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TEST_CASE(erase4);
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TEST_CASE(erase5);
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TEST_CASE(erase6);
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TEST_CASE(eraseBreak);
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TEST_CASE(eraseContinue);
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TEST_CASE(eraseReturn1);
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TEST_CASE(eraseReturn2);
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TEST_CASE(eraseReturn3);
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TEST_CASE(eraseGoto);
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TEST_CASE(eraseAssign1);
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TEST_CASE(eraseAssign2);
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TEST_CASE(eraseErase);
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TEST_CASE(eraseByValue);
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TEST_CASE(pushback1);
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TEST_CASE(pushback2);
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TEST_CASE(pushback3);
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TEST_CASE(pushback4);
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TEST_CASE(pushback5);
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TEST_CASE(pushback6);
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TEST_CASE(pushback7);
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TEST_CASE(pushback8);
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TEST_CASE(pushback9);
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TEST_CASE(pushback10);
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TEST_CASE(pushback11);
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TEST_CASE(insert1);
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TEST_CASE(insert2);
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TEST_CASE(invalidcode);
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TEST_CASE(stlBoundries1);
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TEST_CASE(stlBoundries2);
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TEST_CASE(stlBoundries3);
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// if (str.find("ab"))
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TEST_CASE(if_find);
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TEST_CASE(if_str_find);
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TEST_CASE(size1);
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TEST_CASE(size2);
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// Redundant conditions..
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// if (ints.find(123) != ints.end()) ints.remove(123);
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TEST_CASE(redundantCondition1);
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TEST_CASE(redundantCondition2);
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// missing inner comparison when incrementing iterator inside loop
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TEST_CASE(missingInnerComparison1);
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TEST_CASE(missingInnerComparison2); // no FP when there is comparison
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TEST_CASE(missingInnerComparison3); // no FP when there is iterator shadowing
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TEST_CASE(missingInnerComparison4); // no FP when "break;" is used
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TEST_CASE(missingInnerComparison5); // Ticket #2154 - FP
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TEST_CASE(missingInnerComparison6); // #2643 - 'it=foo.insert(++it,0);'
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// catch common problems when using the string::c_str() function
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TEST_CASE(cstr);
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}
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void check(const std::string &code)
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{
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// Clear the error buffer..
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errout.str("");
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Settings settings;
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settings._checkCodingStyle = true;
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// Tokenize..
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Tokenizer tokenizer(&settings, this);
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std::istringstream istr(code.c_str());
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tokenizer.tokenize(istr, "test.cpp");
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tokenizer.simplifyTokenList();
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// Check..
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CheckStl checkStl;
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checkStl.runSimplifiedChecks(&tokenizer, &settings, this);
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}
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void iterator1()
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{
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check("void f()\n"
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"{\n"
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" list<int> l1;\n"
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" list<int> l2;\n"
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" for (list<int>::iterator it = l1.begin(); it != l2.end(); ++it)\n"
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" { }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:5]: (error) Same iterator is used with both l1 and l2\n", errout.str());
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}
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void iterator2()
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{
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check("void foo()\n"
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"{\n"
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" list<int> l1;\n"
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" list<int> l2;\n"
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" list<int>::iterator it = l1.begin();\n"
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" while (it != l2.end())\n"
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" {\n"
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" ++it;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) Same iterator is used with both l1 and l2\n", errout.str());
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}
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void iterator3()
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{
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check("void foo()\n"
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"{\n"
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" list<int> l1;\n"
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" list<int> l2;\n"
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" list<int>::iterator it = l1.begin();\n"
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" l2.insert(it, 0);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) Same iterator is used with both l1 and l2\n", errout.str());
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}
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void iterator4()
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{
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check("void foo(std::vector<std::string> &test)\n"
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"{\n"
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" std::set<int> result;\n"
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" for (std::vector<std::string>::const_iterator cit = test.begin();\n"
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" cit != test.end();\n"
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" ++cit)\n"
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" {\n"
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" result.insert(cit->size());\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void iterator5()
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{
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check("void foo()\n"
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"{\n"
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" std::vector<int> ints1;\n"
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" std::vector<int> ints2;\n"
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" std::vector<int>::iterator it = std::find(ints1.begin(), ints2.end(), 22);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:5]: (error) mismatching containers\n", errout.str());
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}
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void iterator6()
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{
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// Ticket #1357
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check("void foo(const std::set<int> &ints1)\n"
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"{\n"
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" std::set<int> ints2;\n"
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" std::set<int>::iterator it1 = ints1.begin();\n"
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" std::set<int>::iterator it2 = ints1.end();\n"
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" ints2.insert(it1, it2);\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void iterator7()
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{
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// Ticket #1600
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check("void foo(std::vector<int> &r)\n"
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"{\n"
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" std::vector<int>::iterator aI = r.begin();\n"
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" while(aI != r.end())\n"
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" {\n"
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" if (*aI == 0)\n"
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" {\n"
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" r.insert(aI, 42);\n"
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" return;\n"
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" }\n"
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" ++aI;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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// Ticket #2481
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check("void foo(std::vector<int> &r)\n"
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"{\n"
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" std::vector<int>::iterator aI = r.begin();\n"
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" while(aI != r.end())\n"
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" {\n"
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" if (*aI == 0)\n"
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" {\n"
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" r.insert(aI, 42);\n"
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" break;\n"
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" }\n"
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" ++aI;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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// Execution path checking..
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check("void foo(std::vector<int> &r, int c)\n"
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"{\n"
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" std::vector<int>::iterator aI = r.begin();\n"
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" while(aI != r.end())\n"
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" {\n"
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" if (*aI == 0)\n"
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" {\n"
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" r.insert(aI, 42);\n"
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" if (c)\n"
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" {\n"
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" return;\n"
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" }\n"
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" }\n"
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" ++aI;\n"
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" }\n"
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"}\n");
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TODO_ASSERT_EQUALS("[test.cpp:14] (error) After insert, the iterator 'aI' may be invalid", "", errout.str());
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}
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void iterator8()
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{
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// Ticket #1679
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check("void foo()\n"
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"{\n"
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" std::set<int> s1;\n"
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" std::set<int> s2;\n"
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" for (std::set<int>::iterator it = s1.begin(); it != s1.end(); ++it)\n"
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" {\n"
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" if (true) { }\n"
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" if (it != s2.end()) continue;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:8]: (error) Same iterator is used with both s1 and s2\n", errout.str());
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}
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// Dereferencing invalid pointer
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void dereference()
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{
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check("void f()\n"
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"{\n"
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" std::vector<int> ints;\n"
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" std::vector<int>::iterator iter;\n"
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" iter = ints.begin() + 2;\n"
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" ints.erase(iter);\n"
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" std::cout << (*iter) << std::endl;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:7]: (error) Dereferenced iterator 'iter' has been erased\n", errout.str());
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}
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void dereference_member()
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{
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check("void f()\n"
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"{\n"
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" std::map<int, int> ints;\n"
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" std::map<int, int>::iterator iter;\n"
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" iter = ints.begin();\n"
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" ints.erase(iter);\n"
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" std::cout << iter->first << std::endl;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:7]: (error) Dereferenced iterator 'iter' has been erased\n", errout.str());
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}
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void STLSize()
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{
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check("void foo()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" for (unsigned int ii = 0; ii <= foo.size(); ++ii)\n"
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" {\n"
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" foo[ii] = 0;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) When ii==foo.size(), foo[ii] is out of bounds\n", errout.str());
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check("void foo()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" foo.push_back(1);\n"
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" for (unsigned int ii = 0; ii <= foo.size(); ++ii)\n"
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" {\n"
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" }\n"
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" int ii = 0;\n"
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" foo[ii] = 0;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void STLSizeNoErr()
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{
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{
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check("void foo()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" for (unsigned int ii = 0; ii < foo.size(); ++ii)\n"
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" {\n"
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" foo[ii] = 0;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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{
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check("void foo()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" for (unsigned int ii = 0; ii <= foo.size(); ++ii)\n"
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" {\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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{
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check("void foo()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" for (unsigned int ii = 0; ii <= foo.size(); ++ii)\n"
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" {\n"
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" if (ii == foo.size())\n"
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" {\n"
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" }\n"
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" else\n"
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" {\n"
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" foo[ii] = 0;\n"
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" }\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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}
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void erase1()
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{
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check("void f()\n"
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"{\n"
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" for (it = foo.begin(); it != foo.end(); ++it)\n"
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" {\n"
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" foo.erase(it);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:5]: (error) Dangerous iterator usage after erase()-method.\n", errout.str());
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check("for (it = foo.begin(); it != foo.end(); ++it)\n"
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"{\n"
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" foo.erase(it);\n"
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"}\n"
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"for (it = foo.begin(); it != foo.end(); ++it)\n"
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"{\n"
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" foo.erase(it);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (error) Dangerous iterator usage after erase()-method.\n"
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"[test.cpp:7]: (error) Dangerous iterator usage after erase()-method.\n", errout.str());
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check("void f(std::list<int> &ints)\n"
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"{\n"
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" std::list<int>::iterator i = ints.begin();\n"
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" i = ints.erase(i);\n"
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" *i = 0;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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// #2101
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check("void f(vector< list<int> > &ints, unsigned int i)\n"
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"{\n"
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" list<int>::iterator it;\n"
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" for(it = ints[i].begin(); it != ints[i].end(); it++) {\n"
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" if (*it % 2)\n"
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" it = ints[i].erase(it);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void erase2()
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{
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check("static void f()\n"
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"{\n"
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" for (iterator it = foo.begin(); it != foo.end(); it = next)\n"
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" {\n"
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" next = it;\n"
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" next++;\n"
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" foo.erase(it);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void erase3()
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{
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check("static void f(std::list<abc> &foo)\n"
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"{\n"
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" std::list<abc>::iterator it = foo.begin();\n"
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" foo.erase(it->a);\n"
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" if (it->b);\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void erase4()
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{
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check("void f()\n"
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"{\n"
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" std::list<int>::iterator it, it2;\n"
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" for (it = foo.begin(); it != i2; ++it)\n"
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" {\n"
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" foo.erase(it);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) Dangerous iterator usage after erase()-method.\n", errout.str());
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check("void f()\n"
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"{\n"
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" std::list<int>::iterator it = foo.begin();\n"
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" for (; it != i2; ++it)\n"
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" {\n"
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" foo.erase(it);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) Dangerous iterator usage after erase()-method.\n", errout.str());
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check("void f()\n"
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"{\n"
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" std::list<int>::iterator it = foo.begin();\n"
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" while (it != i2)\n"
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" {\n"
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" foo.erase(it);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) Dangerous iterator usage after erase()-method.\n", errout.str());
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check("void f()\n"
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"{\n"
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" std::list<int>::iterator it = foo.begin();\n"
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" while (it != i2)\n"
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" {\n"
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" foo.erase(++it);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) Dangerous iterator usage after erase()-method.\n", errout.str());
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}
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void erase5()
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{
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check("void f()\n"
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"{\n"
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" std::list<int> foo;\n"
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" std::list<int>::iterator it;\n"
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" for (it = foo.begin(); it != foo.end(); ++it)\n"
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" {\n"
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" if (*it == 123)\n"
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" foo.erase(it);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:8]: (error) Dangerous iterator usage after erase()-method.\n", errout.str());
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}
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void erase6()
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{
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check("void f() {\n"
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" std::vector<int> vec(3);\n"
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" std::vector<int>::iterator it;\n"
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" std::vector<int>::iterator itEnd = vec.end();\n"
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" for (it = vec.begin(); it != itEnd; it = vec.begin(), itEnd = vec.end())\n"
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" {\n"
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" vec.erase(it);\n"
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" }\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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}
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|
|
void eraseBreak()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" for (iterator it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" foo.erase(it);\n"
|
|
" if (x)"
|
|
" break;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:5]: (error) Dangerous iterator usage after erase()-method.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" for (iterator it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" if (x) {\n"
|
|
" foo.erase(it);\n"
|
|
" break;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void eraseContinue()
|
|
{
|
|
check("void f(std::vector<int> &ints)\n"
|
|
"{\n"
|
|
" std::vector<int>::iterator it;\n"
|
|
" std::vector<int>::iterator jt = ints.begin();\n"
|
|
" for (it = ints.begin(); it != ints.end(); it = jt) {\n"
|
|
" ++jt;\n"
|
|
" if (*it == 1) {\n"
|
|
" jt = ints.erase(it);\n"
|
|
" continue;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void eraseReturn1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> foo;\n"
|
|
" std::vector<int>::iterator it;\n"
|
|
" for (it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" foo.erase(it);\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void eraseReturn2()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> foo;\n"
|
|
" std::vector<int>::iterator it;\n"
|
|
" for (it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" if (*it == 1) {\n"
|
|
" foo.erase(it);\n"
|
|
" return;\n"
|
|
" }\n"
|
|
" else {\n"
|
|
" foo.erase(it);\n"
|
|
" return;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void eraseReturn3()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> foo;\n"
|
|
" std::vector<int>::iterator it;\n"
|
|
" for (it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" if (somecondition) {\n"
|
|
" if (*it == 1)\n"
|
|
" foo.erase(it);\n"
|
|
" else\n"
|
|
" *it = 0;\n"
|
|
" return;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> foo;\n"
|
|
" std::vector<int>::iterator it;\n"
|
|
" for (it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" if (a) {\n"
|
|
" if (b)\n"
|
|
" foo.erase(it);\n"
|
|
" else\n"
|
|
" *it = 0;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}\n");
|
|
TODO_ASSERT_EQUALS("[test.cpp:9]: (error) Dangerous iterator usage after erase()-method.\n", "", errout.str());
|
|
}
|
|
|
|
void eraseGoto()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" for (iterator it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" foo.erase(it);\n"
|
|
" goto abc;\n"
|
|
" }\n"
|
|
"bar:\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void eraseAssign1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" for (iterator it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" foo.erase(it);\n"
|
|
" it = foo.begin();\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void eraseAssign2()
|
|
{
|
|
check("void f(list<int> &ints)\n"
|
|
"{\n"
|
|
" for (list<int>::iterator it = ints.begin(); it != ints.end();) {\n"
|
|
" if (*it == 123) {\n"
|
|
" list<int>::iterator copy = it;\n"
|
|
" ++copy;\n"
|
|
" ints.erase(it);\n"
|
|
" it = copy;\n"
|
|
" } else {\n"
|
|
" it->second = 123;\n"
|
|
" ++it;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void eraseErase()
|
|
{
|
|
check("void f(std::vector<ints> &ints)\n"
|
|
"{\n"
|
|
" std::vector<int>::iterator iter;\n"
|
|
" iter = ints.begin() + 2;\n"
|
|
" ints.erase(iter);\n"
|
|
" ints.erase(iter);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:6]: (error) Invalid iterator: iter\n", errout.str());
|
|
}
|
|
|
|
void eraseByValue()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::set<int> foo;\n"
|
|
" for (std::set<int> it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" foo.erase(*it);\n"
|
|
" }\n"
|
|
"}\n");
|
|
TODO_ASSERT_EQUALS("[test.cpp:6]: (error) Iterator 'it' becomes invalid when deleted by value from 'foo'\n", "", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::set<int> foo;\n"
|
|
" std::set<int> it = foo.begin();\n"
|
|
" foo.erase(*it);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void pushback1()
|
|
{
|
|
check("void f(const std::vector<int> &foo)\n"
|
|
"{\n"
|
|
" std::vector<int>::const_iterator it = foo.begin();\n"
|
|
" foo.push_back(123);\n"
|
|
" *it;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:5]: (error) After push_back, the iterator 'it' may be invalid\n", errout.str());
|
|
}
|
|
|
|
void pushback2()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int>::const_iterator it = foo.begin();\n"
|
|
" foo.push_back(123);\n"
|
|
" {\n"
|
|
" int *it = &foo[0];\n"
|
|
" *it = 456;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void pushback3()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> foo;\n"
|
|
" foo.push_back(10);\n"
|
|
" std::vector<int>::iterator it;\n"
|
|
" for (it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" foo.push_back(123);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:8]: (error) After push_back, the iterator 'it' may be invalid\n", errout.str());
|
|
}
|
|
|
|
void pushback4()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> ints;\n"
|
|
" ints.push_back(1);\n"
|
|
" int *first = &ints[0];\n"
|
|
" ints.push_back(2);\n"
|
|
" *first;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:7]: (error) Invalid pointer 'first' after push_back / push_front\n", errout.str());
|
|
}
|
|
|
|
void pushback5()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int>::const_iterator i;\n"
|
|
"\n"
|
|
" for (i=v.begin(); i!=v.end(); ++i)\n"
|
|
" {\n"
|
|
" }\n"
|
|
"\n"
|
|
" for (i=rhs.v.begin(); i!=rhs.v.end(); ++i)\n"
|
|
" {\n"
|
|
" v.push_back(*i);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void pushback6()
|
|
{
|
|
// ticket #735
|
|
check("void f()\n"
|
|
"{\n"
|
|
" vector<int> v;\n"
|
|
" vector.push_back(1);\n"
|
|
" vector.push_back(2);\n"
|
|
" for (vector<int>::iterator it = v.begin(); it != v.end(); ++it)\n"
|
|
" {\n"
|
|
" if (*it == 1)\n"
|
|
" v.push_back(10);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:9]: (error) After push_back, the iterator 'it' may be invalid\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> v;\n"
|
|
" vector.push_back(1);\n"
|
|
" vector.push_back(2);\n"
|
|
" for (std::vector<int>::iterator it = v.begin(); it != v.end(); ++it)\n"
|
|
" {\n"
|
|
" if (*it == 1)\n"
|
|
" v.push_back(10);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:9]: (error) After push_back, the iterator 'it' may be invalid\n", errout.str());
|
|
}
|
|
|
|
void pushback7()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> foo;\n"
|
|
" foo.push_back(10);\n"
|
|
" std::vector<int>::iterator it;\n"
|
|
" for (it = foo.begin(); it != foo.end(); it++)\n"
|
|
" {\n"
|
|
" foo.push_back(123);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:8]: (error) After push_back, the iterator 'it' may be invalid\n", errout.str());
|
|
}
|
|
|
|
void pushback8()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> ints;\n"
|
|
" std::vector<int>::const_iterator end = ints.end();\n"
|
|
" ints.push_back(10);\n"
|
|
" std::vector<int>::iterator it;\n"
|
|
" unsigned int sum = 0;\n"
|
|
" for (it = ints.begin(); it != end; ++it)\n"
|
|
" {\n"
|
|
" sum += *it;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:8]: (error) After push_back, the iterator 'end' may be invalid\n", errout.str());
|
|
}
|
|
|
|
void pushback9()
|
|
{
|
|
check("struct A {\n"
|
|
" std::vector<int> ints;\n"
|
|
"};\n"
|
|
"\n"
|
|
"void f()\n"
|
|
"{\n"
|
|
" std::vector<int> ints;\n"
|
|
" A a;\n"
|
|
" std::vector<int>::const_iterator i = ints.begin();\n"
|
|
" std::vector<int>::const_iterator e = ints.end();\n"
|
|
" while (i != e)\n"
|
|
" {\n"
|
|
" a.ints.push_back(*i);\n"
|
|
" ++i;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void pushback10()
|
|
{
|
|
check("void f(std::vector<int> &foo)\n"
|
|
"{\n"
|
|
" std::vector<int>::const_iterator it = foo.begin();\n"
|
|
" foo.reserve(100);\n"
|
|
" *it = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:5]: (error) After reserve, the iterator 'it' may be invalid\n", errout.str());
|
|
|
|
// in loop
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> foo;\n"
|
|
" foo.push_back(10);\n"
|
|
" std::vector<int>::iterator it;\n"
|
|
" for (it = foo.begin(); it != foo.end(); ++it)\n"
|
|
" {\n"
|
|
" foo.reserve(123);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:8]: (error) After reserve, the iterator 'it' may be invalid\n", errout.str());
|
|
}
|
|
|
|
void pushback11()
|
|
{
|
|
// #2798
|
|
check("void f() {\n"
|
|
" std::vector<int> ints;\n"
|
|
" std::vector<int>::iterator it = ints.begin();\n"
|
|
" if (it == ints.begin()) {\n"
|
|
" ints.push_back(0);\n"
|
|
" } else {\n"
|
|
" ints.insert(it,0);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void insert1()
|
|
{
|
|
check("void f(std::vector<int> &ints)\n"
|
|
"{\n"
|
|
" std::vector<int>::iterator iter = ints.begin() + 5;\n"
|
|
" ints.insert(ints.begin(), 1);\n"
|
|
" ++iter;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:5]: (error) After insert, the iterator 'iter' may be invalid\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> ints;\n"
|
|
" std::vector<int>::iterator iter = ints.begin();\n"
|
|
" ints.insert(iter, 1);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<int> ints;\n"
|
|
" std::vector<int>::iterator iter = ints.begin();\n"
|
|
" ints.insert(iter, 1);\n"
|
|
" ints.insert(iter, 2);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:6]: (error) After insert, the iterator 'iter' may be invalid\n", errout.str());
|
|
}
|
|
|
|
void insert2()
|
|
{
|
|
// Ticket: #2169
|
|
check("void f(std::vector<int> &vec) {\n"
|
|
" for(std::vector<int>::iterator iter = vec.begin(); iter != vec.end(); ++iter)\n"
|
|
" {\n"
|
|
" vec.insert(iter, 0);\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(std::vector<int> &vec) {\n"
|
|
" for(std::vector<int>::iterator iter = vec.begin(); iter != vec.end(); ++iter)\n"
|
|
" {\n"
|
|
" if (*it == 0) {\n"
|
|
" vec.insert(iter, 0);\n"
|
|
" return;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void invalidcode()
|
|
{
|
|
errout.str("");
|
|
const std::string src = "void f()\n"
|
|
"{\n"
|
|
" for ( \n"
|
|
"}\n";
|
|
|
|
Settings settings;
|
|
Tokenizer tokenizer(&settings, this);
|
|
std::istringstream istr(src);
|
|
ASSERT_EQUALS(false, tokenizer.tokenize(istr, "test.cpp"));
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Invalid number of character (() when these macros are defined: ''.\n", errout.str());
|
|
}
|
|
|
|
|
|
|
|
void stlBoundries1()
|
|
{
|
|
const int STL_CONTAINER_LIST = 9;
|
|
const std::string stlCont[STL_CONTAINER_LIST] =
|
|
{
|
|
"deque", "list", "set", "multiset", "map",
|
|
"multimap", "hash_map", "hash_multimap", "hash_set"
|
|
};
|
|
|
|
for (int i = 0; i < STL_CONTAINER_LIST; ++i)
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::" + stlCont[i] + "<int>::iterator it;\n"
|
|
" for (it = ab.begin(); it < ab.end(); ++it)\n"
|
|
" ;\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Dangerous container iterator compare using < operator for " + stlCont[i] + "\n", errout.str());
|
|
}
|
|
}
|
|
|
|
void stlBoundries2()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::vector<std::string> files;\n"
|
|
" std::vector<std::string>::const_iterator it;\n"
|
|
" for (it = files.begin(); it < files.end(); it++) { }\n"
|
|
" for (it = files.begin(); it < files.end(); it++) { };\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void stlBoundries3()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" set<int> files;\n"
|
|
" set<int>::const_iterator current;\n"
|
|
" for (current = files.begin(); current != files.end(); ++current)\n"
|
|
" {\n"
|
|
" assert(*current < 100)\n"
|
|
" }\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
|
|
void if_find()
|
|
{
|
|
// ---------------------------
|
|
// set::find
|
|
// ---------------------------
|
|
|
|
// error
|
|
check("void f(std::set<int> s)\n"
|
|
"{\n"
|
|
" if (s.find(12)) { }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Suspicious condition. The result of find is an iterator, but it is not properly checked.\n", errout.str());
|
|
|
|
// ok
|
|
check("void f(std::set<int> s)\n"
|
|
"{\n"
|
|
" if (s.find(123) != s.end()) { }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
// ---------------------------
|
|
// std::find
|
|
// ---------------------------
|
|
|
|
// error
|
|
check("void f()\n"
|
|
"{\n"
|
|
" if (std::find(a,b,c)) { }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Suspicious condition. The result of find is an iterator, but it is not properly checked.\n", errout.str());
|
|
|
|
// ok
|
|
check("void f()\n"
|
|
"{\n"
|
|
" if (std::find(a,b,c) != c) { }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void if_str_find()
|
|
{
|
|
// error
|
|
check("void f(const std::string &s)\n"
|
|
"{\n"
|
|
" if (s.find(\"abc\")) { }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Suspicious checking of string::find() return value.\n", errout.str());
|
|
}
|
|
|
|
|
|
void size1()
|
|
{
|
|
check("struct Fred {\n"
|
|
" void foo();\n"
|
|
" std::list<int> x;\n"
|
|
"};\n"
|
|
"void Fred::foo()\n"
|
|
"{\n"
|
|
" if (x.size() == 0) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:7]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
|
|
check("std::list<int> x;\n"
|
|
"void f()\n"
|
|
"{\n"
|
|
" if (x.size() == 0) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::list<int> x;\n"
|
|
" if (x.size() == 0) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::list<int> x;\n"
|
|
" if (0 == x.size()) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::list<int> x;\n"
|
|
" if (x.size() != 0) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::list<int> x;\n"
|
|
" if (0 != x.size()) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::list<int> x;\n"
|
|
" if (x.size() > 0) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::list<int> x;\n"
|
|
" if (0 < x.size()) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::list<int> x;\n"
|
|
" if (x.size()) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::list<int> x;\n"
|
|
" if (!x.size()) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::list<int> x;\n"
|
|
" fun(x.size());\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" std::list<int> x;\n"
|
|
" fun(!x.size());\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void redundantCondition1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" if (haystack.find(needle) != haystack.end())\n"
|
|
" haystack.remove(needle);"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Redundant checking of STL container element.\n", errout.str());
|
|
}
|
|
|
|
void size2()
|
|
{
|
|
check("struct Fred {\n"
|
|
" std::list<int> x;\n"
|
|
"};\n"
|
|
"struct Wilma {\n"
|
|
" Fred f;\n"
|
|
" void foo();\n"
|
|
"};\n"
|
|
"void Wilma::foo()\n"
|
|
"{\n"
|
|
" if (f.x.size() == 0) {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:10]: (performance) Possible inefficient checking for 'x' emptiness.\n", errout.str());
|
|
}
|
|
|
|
void redundantCondition2()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" if (haystack.find(needle) != haystack.end())\n"
|
|
" {\n"
|
|
" haystack.remove(needle);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Redundant checking of STL container element.\n", errout.str());
|
|
}
|
|
|
|
void missingInnerComparison1()
|
|
{
|
|
check("void f(std::set<int> &ints) {\n"
|
|
" for (std::set<int>::iterator it = ints.begin(); it != ints.end(); ++it) {\n"
|
|
" if (a) {\n"
|
|
" it++;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (warning) Missing bounds check for extra iterator increment in loop.\n", errout.str());
|
|
|
|
check("void f(std::map<int,int> &ints) {\n"
|
|
" for (std::map<int,int>::iterator it = ints.begin(); it != ints.end(); ++it) {\n"
|
|
" ++it->second;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void missingInnerComparison2()
|
|
{
|
|
check("void f(std::set<int> &ints) {\n"
|
|
" for (std::set<int>::iterator it = ints.begin(); it != ints.end(); ++it) {\n"
|
|
" if (a) {\n"
|
|
" it++;\n"
|
|
" if (it == ints.end())\n"
|
|
" return;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void missingInnerComparison3()
|
|
{
|
|
check("void f(std::set<int> &ints) {\n"
|
|
" for (std::set<int>::iterator it = ints.begin(); it != ints.end(); ++it) {\n"
|
|
" for (std::set<int>::iterator it = ints2.begin(); it != ints2.end(); ++it)\n"
|
|
" { }\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void missingInnerComparison4()
|
|
{
|
|
check("function f1(std::list<int> &l1) {\n"
|
|
" for(std::list<int>::iterator i = l1.begin(); i != l1.end(); i++) {\n"
|
|
" if (*i == 44) {\n"
|
|
" l1.insert(++i, 55);\n"
|
|
" break;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("function f1(std::list<int> &l1) {\n"
|
|
" for(std::list<int>::iterator i = l1.begin(); i != l1.end(); i++) {\n"
|
|
" if (*i == 44) {\n"
|
|
" l1.insert(++i, 55);\n"
|
|
" return;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void missingInnerComparison5()
|
|
{
|
|
check("void f() {\n"
|
|
" for(it = map1.begin(); it != map1.end(); it++) {\n"
|
|
" str[i++] = (*it).first;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void missingInnerComparison6()
|
|
{
|
|
check("void f(std::string &s) {\n"
|
|
" for(string::iterator it = s.begin(); it != s.end(); it++) {\n"
|
|
" it = s.insert(++it, 0);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void cstr()
|
|
{
|
|
check("void f() {\n"
|
|
" std::string errmsg;\n"
|
|
" throw errmsg.c_str();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Dangerous usage of c_str()\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" std::ostringstream errmsg;\n"
|
|
" const char *c = errmsg.str().c_str();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Dangerous usage of c_str()\n", errout.str());
|
|
|
|
check("std::string f();\n"
|
|
"\n"
|
|
"void foo() {\n"
|
|
" const char *c = f().c_str();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Dangerous usage of c_str()\n", errout.str());
|
|
}
|
|
};
|
|
|
|
REGISTER_TEST(TestStl)
|